Hop doesn't do a whole lot in the visuals department. On a handheld console that has been out some 6+ years, it's a shame for a new game to come out that feels like it was a launch title. Actually, it does that in more areas than just the graphics section, but I'll get to that later. Besides the odd mini-games sprinkled between levels, the game takes on a top-down shooter style where you run around areas in the game's four locations. The levels themselves are nice and big, but after a few screens, they will all start to blend together.
Another aspect that makes the game feel like an original DS title is that it doesn't really use the top screen all that effectively. During the shooting levels, it simply displays your health, while several of the mini-games will throw up a static picture. It almost feels like Hop was a port from the GameBoy Advance.
Hop's audio is about on par with its graphics. There is a constant tune playing in the background that, while not annoying at first, will get to feeling a bit repetitive after a while. Thankfully, the game's fairly quick levels mean that it is well designed for short bursts of gameplay so, unless you are in for a long car trip, you shouldn't get to that annoyance-level too frequently. Other audio-bits like the sound effects are okay, but feel very generic.